24 straight seasons of knee sprains, grass stains and night games. >> go! >> reporter: mom and dad have nary missed a single contest, screaming like teenagers, cursing like true minnesotans. >> oh, sugar! >> reporter: cheering on each child like an only child. >> seth, you got to do it, come on! >> mom and dad, it's very obvious they were passionate about their football and their sports and their kids. >> reporter: steve is the oldest at 38; seth, the youngest at 18. in between, too many to name or for that matter -- >> what, another one? >> reporter: -- even notice them all. >> it's amazing, we didn't even miss him! >> reporter: can you imagine all these guys growing up under one roof? >> my dad leaves the house? hey, let's play football! >> when we bought the house, this green carpet was here. they said, "it's a natural playing field." >> reporter: over the years, karen says they broke almost her entire collection of ceramic figurines. the kids blame her for setting them on what is clearly a goalpost crossbar.